<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 图像 -->
      <div class="avatar_box">
        <img src="./../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区 -->
      <el-form ref="loginFormRef" class="login_form" :model="loginForm" :rules="loginFormRules">
        <el-form-item  prop="username">
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
         <el-form-item prop="password">
          <el-input  prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
        </el-form-item>
        <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
    data(){
        return {
            //登录表单数据
            loginForm:{
                username:'admin',
                password:'123456',
            },
            //表单验证规则
            loginFormRules:{
                username:[
                    { required: true, message: '请输入用户名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                password:[
                     { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    methods:{
        resetLoginForm(){
            // 表单重置
            this.$refs.loginFormRef.resetFields();
        },
        login(){
            // 表单验证
            this.$refs.loginFormRef.validate(async valid=>{
                if (!valid) return;
                const { data: res} = await this.$http.post('login',this.loginForm)
                // console.log(res)
                if(res.meta.status !== 200) return this.$message.error('登录失败')
                this.$message.success('登录成功')
                // 1、将登陆成功之后的token, 保存到客户端的sessionStorage中; localStorage中是持久化的保存
                //   1.1 项目中出现了登录之外的其他API接口，必须在登陆之后才能访问
                //   1.2 token 只应在当前网站打开期间生效，所以将token保存在sessionStorage中
                window.sessionStorage.setItem('token',res.data.token)
                // 2、通过编程式导航跳转到后台主页, 路由地址为：/home
                this.$router.push('/home')
            })
        }
    }
}
</script>
<style lang="less" scoped>
.login_container {
  background: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eeeeee;
    border-radius: 50%;
    padding: 10px;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background: #eee;
      box-shadow: 0 0 10px #cccccc;
    }   
  }
}

.login_form {
    position: absolute;
    bottom: 0px;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
} 

.btns {
    display: flex;
    justify-content: flex-end;
}
</style>
